this poll gives some hint why there are more people playing as axis:
http://www.coh2.org/topic/20528/big-poll
one thing people should keep in mind:
the numbers shown while searching for a game make the problem of people prefering axis seem much larger than it actually is:
an example: lets say 100 players want to play as axis, 110 players want to play the allies. a game lasts 30 minutes, waiting for a game takes 3 minutes.
that means that of the 210 total players only 1/11 (19%) are currently looking for a game.
since ingame the number of axis and allies are always equal, that means of the about 20 people currently looking for a new game there would be 15 (75%) searching as axis and only 5 (25%) searching as allies
qft